diff --git a/runtime/syntax/java.vim b/runtime/syntax/java.vim
index c2cba1a..b612cca 100644
--- a/runtime/syntax/java.vim
+++ b/runtime/syntax/java.vim
@@ -146,6 +146,30 @@
   syn keyword javaModuleExternal	to with
 endif
 
+" Fancy parameterised types (JLS-17, §4.5).
+"
+" Note that false positives may elsewhere occur whenever an identifier
+" is butted against a less-than operator.  Cf. (X<Y) and (X < Y).
+if exists("java_highlight_generics")
+  syn keyword javaWildcardBound contained extends super
+
+  " Parameterised types are delegated to javaGenerics (s:ctx.gsg) and
+  " are not matched with javaTypeArgument.
+  exec 'syn match javaTypeArgument contained "' . s:ff.Engine('\%#=2', '') . '?\|\%(\<\%(b\%(oolean\|yte\)\|char\|short\|int\|long\|float\|double\)\[\]\|\%(\<\K\k*\>\.\)*\<' . s:ff.UpperCase('[$_[:upper:]]', '[^a-z0-9]') . '\k*\>\)\%(\[\]\)*"'
+
+  for s:ctx in [{'dsg': 'javaDimExpr', 'gsg': 'javaGenerics', 'ghg': 'javaGenericsC1', 'csg': 'javaGenericsX', 'c': ''},
+      \ {'dsg': 'javaDimExprX', 'gsg': 'javaGenericsX', 'ghg': 'javaGenericsC2', 'csg': 'javaGenerics', 'c': ' contained'}]
+    " Consider array creation expressions of reifiable types.
+    exec 'syn region ' . s:ctx.dsg . ' contained transparent matchgroup=' . s:ctx.ghg . ' start="\[" end="\]" nextgroup=' . s:ctx.dsg . ' skipwhite skipnl'
+    exec 'syn region ' . s:ctx.gsg . s:ctx.c . ' transparent matchgroup=' . s:ctx.ghg . ' start=/' . s:ff.Engine('\%#=2', '') . '\%(\<\K\k*\>\.\)*\<' . s:ff.UpperCase('[$_[:upper:]]', '[^a-z0-9]') . '\k*\><\%([[:space:]\n]*\%([?@]\|\<\%(b\%(oolean\|yte\)\|char\|short\|int\|long\|float\|double\)\[\]\|\%(\<\K\k*\>\.\)*\<' . s:ff.UpperCase('[$_[:upper:]]', '[^a-z0-9]') . '\k*\>\)\)\@=/ end=/>/ contains=' . s:ctx.csg . ',javaAnnotation,javaTypeArgument,javaWildcardBound,javaType,@javaClasses nextgroup=' . s:ctx.dsg . ' skipwhite skipnl'
+  endfor
+
+  unlet s:ctx
+  hi def link javaWildcardBound Question
+  hi def link javaGenericsC1 javaFuncDef
+  hi def link javaGenericsC2 javaType
+endif
+
 if exists("java_highlight_java_lang_ids")
   let java_highlight_all=1
 endif
@@ -175,9 +199,15 @@
   exec 'syn match javaC_JavaLang "\%(\<ModuleLayer\.\)\@' . s:ff.Peek('12', '') . '<=\<Controller\>"'
   exec 'syn match javaC_JavaLang "\%(\<Runtime\.\)\@' . s:ff.Peek('8', '') . '<=\<Version\>"'
   exec 'syn match javaC_JavaLang "\%(\<System\.\)\@' . s:ff.Peek('7', '') . '<=\<LoggerFinder\>"'
-  exec 'syn match javaC_JavaLang "\%(\<Enum\.\)\@' . s:ff.Peek('5', '') . '<=\<EnumDesc\>"'
-  syn keyword javaC_JavaLang Boolean Character Class ClassLoader Compiler Double Float Integer Long Math Number Object Process Runtime SecurityManager String StringBuffer Thread ThreadGroup Byte Short Void InheritableThreadLocal Package RuntimePermission ThreadLocal StrictMath StackTraceElement Enum ProcessBuilder StringBuilder ClassValue Module ModuleLayer StackWalker Record
+  syn keyword javaC_JavaLang Boolean Character ClassLoader Compiler Double Float Integer Long Math Number Object Process Runtime SecurityManager String StringBuffer Thread ThreadGroup Byte Short Void Package RuntimePermission StrictMath StackTraceElement ProcessBuilder StringBuilder Module ModuleLayer StackWalker Record
   syn match   javaC_JavaLang "\<System\>"	" See javaDebug.
+
+  if !exists("java_highlight_generics")
+    " The non-interface parameterised names of java.lang members.
+    exec 'syn match javaC_JavaLang "\%(\<Enum\.\)\@' . s:ff.Peek('5', '') . '<=\<EnumDesc\>"'
+    syn keyword javaC_JavaLang Class InheritableThreadLocal ThreadLocal Enum ClassValue
+  endif
+
   " As of JDK 21, java.lang.Compiler is no more (deprecated in JDK 9).
   syn keyword javaLangDeprecated Compiler
   syn cluster javaClasses add=javaC_JavaLang
@@ -217,7 +247,7 @@
 endif
 
 exec 'syn match javaUserLabel "^\s*\<\K\k*\>\%(\<default\>\)\@' . s:ff.Peek('7', '') . '<!\s*:"he=e-1'
-syn region  javaLabelRegion	transparent matchgroup=javaLabel start="\<case\>" matchgroup=NONE end=":\|->" contains=javaLabelCastType,javaLabelNumber,javaCharacter,javaString,javaConstant,@javaClasses,javaLabelDefault,javaLabelVarType,javaLabelWhenClause
+syn region  javaLabelRegion	transparent matchgroup=javaLabel start="\<case\>" matchgroup=NONE end=":\|->" contains=javaLabelCastType,javaLabelNumber,javaCharacter,javaString,javaConstant,@javaClasses,javaGenerics,javaLabelDefault,javaLabelVarType,javaLabelWhenClause
 syn region  javaLabelRegion	transparent matchgroup=javaLabel start="\<default\>\%(\s*\%(:\|->\)\)\@=" matchgroup=NONE end=":\|->" oneline
 " Consider grouped _default_ _case_ labels, i.e.
 " case null, default ->
@@ -332,7 +362,7 @@
 
 " Method declarations (JLS-17, §8.4.3, §8.4.4, §9.4).
 if exists("java_highlight_functions")
-  syn cluster javaFuncParams contains=javaAnnotation,@javaClasses,javaType,javaVarArg,javaComment,javaLineComment
+  syn cluster javaFuncParams contains=javaAnnotation,@javaClasses,javaGenerics,javaType,javaVarArg,javaComment,javaLineComment
 
   if java_highlight_functions =~# '^indent[1-8]\=$'
     let s:last = java_highlight_functions[-1 :]
@@ -443,7 +473,7 @@
   " There is no recognition of expressions interspersed with comments
   " or of expressions whose parameterised parameter types are written
   " across multiple lines.
-  exec 'syn match javaLambdaDef "\k\@' . s:ff.Peek('4', '') . '<!([[:space:]\n]*\%(\%(@\%(\K\k*\.\)*\K\k*\>\%((\_.\{-1,})\)\{-,1}[[:space:]\n]\+\)*\%(final[[:space:]\n]\+\)\=\%(\<\K\k*\>\.\)*\<\K\k*\>\%(<[^(){}]*[[:space:]-]\@' . s:ff.Peek('1', '') . '<!>\)\=\%(\%(\%(\[\]\)\+\|\.\.\.\)\)\=[[:space:]\n]\+\<\K\k*\>\%(\[\]\)*\%(,[[:space:]\n]*\)\=\)\+)[[:space:]\n]*->" contains=javaAnnotation,javaParamModifier,javaLambdaVarType,javaType,@javaClasses,javaVarArg'
+  exec 'syn match javaLambdaDef "\k\@' . s:ff.Peek('4', '') . '<!([[:space:]\n]*\%(\%(@\%(\K\k*\.\)*\K\k*\>\%((\_.\{-1,})\)\{-,1}[[:space:]\n]\+\)*\%(final[[:space:]\n]\+\)\=\%(\<\K\k*\>\.\)*\<\K\k*\>\%(<[^(){}]*[[:space:]-]\@' . s:ff.Peek('1', '') . '<!>\)\=\%(\%(\%(\[\]\)\+\|\.\.\.\)\)\=[[:space:]\n]\+\<\K\k*\>\%(\[\]\)*\%(,[[:space:]\n]*\)\=\)\+)[[:space:]\n]*->" contains=javaAnnotation,javaParamModifier,javaLambdaVarType,javaType,@javaClasses,javaGenerics,javaVarArg'
   " Match: () ->
   "	| (a[, b, ...]) ->
   exec 'syn match javaLambdaDef "\k\@' . s:ff.Peek('4', '') . '<!([[:space:]\n]*\%(\<\K\k*\>\%(,[[:space:]\n]*\)\=\)*)[[:space:]\n]*->"'
diff --git a/runtime/syntax/testdir/dumps/java_generics_00.dump b/runtime/syntax/testdir/dumps/java_generics_00.dump
new file mode 100644
index 0000000..0d7c4f9
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_generics_00.dump
@@ -0,0 +1,20 @@
+>/+0#0000e05#ffffff0@1| |V|I|M|_|T|E|S|T|_|S|E|T|U|P| |l|e|t| |g|:|j|a|v|a|_|h|i|g|h|l|i|g|h|t|_|f|u|n|c|t|i|o|n|s| |=| |'|s|t|y|l|e|'| +0#0000000&@16
+|/+0#0000e05&@1| |V|I|M|_|T|E|S|T|_|S|E|T|U|P| |l|e|t| |g|:|j|a|v|a|_|h|i|g|h|l|i|g|h|t|_|g|e|n|e|r|i|c|s| |=| |1| +0#0000000&@23
+|/+0#0000e05&@1| |V|I|M|_|T|E|S|T|_|S|E|T|U|P| |h|i| |l|i|n|k| |j|a|v|a|G|e|n|e|r|i|c|s|C|1| |T|o|d|o| +0#0000000&@29
+|/+0#0000e05&@1| |V|I|M|_|T|E|S|T|_|S|E|T|U|P| |h|i| |l|i|n|k| |j|a|v|a|G|e|n|e|r|i|c|s|C|2| |E|r@1|o|r| +0#0000000&@28
+@75
+|i+0#e000e06&|m|p|o|r|t| +0#0000000&|j|a|v|a|.|m|a|t|h|.|B|i|g|I|n|t|e|g|e|r|;| @46
+|i+0#e000e06&|m|p|o|r|t| +0#0000000&|j|a|v|a|.|u|t|i|l|.|f|u|n|c|t|i|o|n|.|C|o|n|s|u|m|e|r|;| @39
+|i+0#e000e06&|m|p|o|r|t| +0#0000000&|j|a|v|a|.|u|t|i|l|.|f|u|n|c|t|i|o|n|.|F|u|n|c|t|i|o|n|;| @39
+|i+0#e000e06&|m|p|o|r|t| +0#0000000&|j|a|v|a|.|u|t|i|l|.|f|u|n|c|t|i|o|n|.|L|o|n|g|F|u|n|c|t|i|o|n|;| @35
+|i+0#e000e06&|m|p|o|r|t| +0#0000000&|j|a|v|a|.|u|t|i|l|.|f|u|n|c|t|i|o|n|.|P|r|e|d|i|c|a|t|e|;| @38
+@75
+|c+0#00e0003&|l|a|s@1| +0#0000000&|G+0#0000001#ffff4012|e|n|e|r|i|c|s|T|e|s|t|s|<|T+0#0000000#ffffff0| |e+0#00e0003&|x|t|e|n|d|s| +0#0000000&|N|u|m|b|e|r| |&| |C+0#ffffff16#ff404010|o|m|p|a|r|a|b|l|e|<|?+0#0000000#ffffff0| |s+0#00e0003&|u|p|e|r| +0#0000000&|T|>+0#ffffff16#ff404010|,+0#0000000#ffffff0| |U|>+0#0000001#ffff4012| +0#0000000#ffffff0@10
+|{| @2|/+0#0000e05&@1| |J|D|K| |2|1|+|.| +0#0000000&@59
+@4|s+0#00e0003&|t|a|t|i|c| +0#0000000&|f+0#4040ff13&|i|n|a|l| +0#0000000&|F+0#0000001#ffff4012|u|n|c|t|i|o|n|<|F+0#ffffff16#ff404010|u|n|c|t|i|o|n|<|O+0#0000000#ffffff0|b|j|e|c|t|,| |O|b|j|e|c|t|>+0#ffffff16#ff404010|,+0#0000000#ffffff0| |O|b|j|e|c|t|>+0#0000001#ffff4012| +0#0000000#ffffff0|P|A|R|T|I|A|L| |=| @5
+@24|G|e|n|e|r|i|c|s|T|e|s|t|s|.|y|0|(|)|;| @31
+@4|s+0#00e0003&|t|a|t|i|c| +0#0000000&|f+0#4040ff13&|i|n|a|l| +0#0000000&|F+0#0000001#ffff4012|u|n|c|t|i|o|n|<|B+0#0000000#ffffff0|i|g|I|n|t|e|g|e|r|,| |B|i|g|I|n|t|e|g|e|r|>+0#0000001#ffff4012| +0#0000000#ffffff0|F|A|C|T|O|R|I|A|L|_|2|0@2| |=| @8
+@16|G|e|n|e|r|i|c|s|T|e|s|t|s|.|<|B|i|g|I|n|t|e|g|e|r|,| |B|i|g|I|n|t|e|g|e|r|>|y|1|(|)| @16
+@8|.|a|p@1|l|y|(|f+0#00e0e07&| |-|>| +0#0000000&|x+0#00e0e07&| |-|>| +0#0000000&|(|x|.|c|o|m|p|a|r|e|T|o|(|B|i|g|I|n|t|e|g|e|r|.|O|N|E|)| |<| |1+0#e000002&|)+0#0000000&| @16
+@12|?| |B|i|g|I|n|t|e|g|e|r|.|O|N|E| @46
+@57|1|,|1| @10|T|o|p| 
diff --git a/runtime/syntax/testdir/dumps/java_generics_01.dump b/runtime/syntax/testdir/dumps/java_generics_01.dump
new file mode 100644
index 0000000..b5650c7
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_generics_01.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@3|s+0#00e0003&|t|a|t|i|c| +0#0000000&|f+0#4040ff13&|i|n|a|l| +0#0000000&|F+0#0000001#ffff4012|u|n|c|t|i|o|n|<|F+0#ffffff16#ff404010|u|n|c|t|i|o|n|<|O+0#0000000#ffffff0|b|j|e|c|t|,| |O|b|j|e|c|t|>+0#ffffff16#ff404010|,+0#0000000#ffffff0| |O|b|j|e|c|t|>+0#0000001#ffff4012| +0#0000000#ffffff0|P|A|R|T|I|A|L| |=| @5
+@24|G|e|n|e|r|i|c|s|T|e|s|t|s|.|y|0|(|)|;| @31
+@4|s+0#00e0003&|t|a|t|i|c| +0#0000000&|f+0#4040ff13&|i|n|a|l| +0#0000000&|F+0#0000001#ffff4012|u|n|c|t|i|o|n|<|B+0#0000000#ffffff0|i|g|I|n|t|e|g|e|r|,| |B|i|g|I|n|t|e|g|e|r|>+0#0000001#ffff4012| +0#0000000#ffffff0|F|A|C|T|O|R|I|A|L|_|2|0@2| |=| @8
+@16|G|e|n|e|r|i|c|s|T|e|s|t|s|.|<|B|i|g|I|n|t|e|g|e|r|,| |B|i|g|I|n|t|e|g|e|r|>|y|1|(|)| @16
+@8|.|a|p@1|l|y|(|f+0#00e0e07&| |-|>| +0#0000000&|x+0#00e0e07&| |-|>| +0#0000000&|(|x|.|c|o|m|p|a|r|e|T|o|(|B|i|g|I|n|t|e|g|e|r|.|O|N|E|)| |<| |1+0#e000002&|)+0#0000000&| @16
+@12>?| |B|i|g|I|n|t|e|g|e|r|.|O|N|E| @46
+@12|:| |x|.|m|u|l|t|i|p|l|y|(|f|.|a|p@1|l|y|(|x|.|s|u|b|t|r|a|c|t|(|B|i|g|I|n|t|e|g|e|r|.|O|N|E|)@3|;| @11
+@75
+| +0#00e0e07&@3|s+0#00e0003&|t|a|t|i|c| +0#00e0e07&|<|T|1|>| |Y+0#0000001#ffff4012|0|<|T+0#0000000#ffffff0|1|>+0#0000001#ffff4012| +0#00e0e07#ffffff0|y|0|(|)| +0#0000000&@47
+@4|{| @69
+@8|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|(+0#00e0e07&|F+0#0000001#ffff4012|u|n|c|t|i|o|n|<|T+0#0000000#ffffff0|1|,+0#00e0e07&| |T+0#0000000&|1|>+0#0000001#ffff4012| +0#00e0e07#ffffff0|f|)| |-|>| +0#0000000&|f|.|a|p@1|l|y|(| @27
+@20|G|e|n|e|r|i|c|s|T|e|s|t|s|.|<|T|1|>|y|0|(|)| @32
+@24|.|a|p@1|l|y|(|f|)@1|;| @39
+@4|}| @69
+@75
+| +0#00e0e07&@3|s+0#00e0003&|t|a|t|i|c| +0#00e0e07&|<|T|1|,| |T|2|>| |Y+0#0000001#ffff4012|1|<|T+0#0000000#ffffff0|1|,+0#00e0e07&| |T+0#0000000&|2|>+0#0000001#ffff4012| +0#00e0e07#ffffff0|y|1|(|)| +0#0000000&@39
+@4|{| @69
+@8|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|(+0#00e0e07&|F+0#0000001#ffff4012|u|n|c|t|i|o|n|<|F+0#ffffff16#ff404010|u|n|c|t|i|o|n|<|T+0#0000000#ffffff0|1|,+0#00e0e07&| |T+0#0000000&|2|>+0#ffffff16#ff404010|,+0#00e0e07#ffffff0| |F+0#ffffff16#ff404010|u|n|c|t|i|o|n|<|T+0#0000000#ffffff0|1|,+0#00e0e07&| |T+0#0000000&|2|>+0#ffffff16#ff404010|>+0#0000001#ffff4012| +0#00e0e07#ffffff0|f|)| |-|>| +0#0000000&@8
+@12|(+0#00e0e07&|T|1| |x|)| |-|>| +0#0000000&|f|.|a|p@1|l|y|(|G|e|n|e|r|i|c|s|T|e|s|t|s|.|<|T|1|,| |T|2|>|y|1|(|)| @18
+@57|1|9|,|4|-|1|3| @6|1|0|%| 
diff --git a/runtime/syntax/testdir/dumps/java_generics_02.dump b/runtime/syntax/testdir/dumps/java_generics_02.dump
new file mode 100644
index 0000000..af51ce3
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_generics_02.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@11|(+0#00e0e07&|T|1| |x|)| |-|>| +0#0000000&|f|.|a|p@1|l|y|(|G|e|n|e|r|i|c|s|T|e|s|t|s|.|<|T|1|,| |T|2|>|y|1|(|)| @18
+@24|.|a|p@1|l|y|(|f|)@1| @40
+@16|.|a|p@1|l|y|(|x|)|;| @48
+@4|}| @69
+@75
+@4>s+0#00e0003&|t|a|t|i|c|<+0#0000000&|T|>| |v+0#00e0003&|o|i|d| +0#0000000&|n|o|O|p|(|T| |d|u|m@1|y|)| |{| |}| @38
+@75
+@4|i+0#00e0003&|n|t|e|r|f|a|c|e| +0#0000000&|a|l|p|h|a|<|T|>| |{| |}| @48
+@75
+@4|i+0#00e0003&|n|t|e|r|f|a|c|e| +0#0000000&|Y+0#0000001#ffff4012|0|<|T+0#0000000#ffffff0|1|>+0#0000001#ffff4012| +0#0000000#ffffff0|e+0#00e0003&|x|t|e|n|d|s| +0#0000000&|F+0#0000001#ffff4012|u|n|c|t|i|o|n|<|F+0#ffffff16#ff404010|u|n|c|t|i|o|n|<|T+0#0000000#ffffff0|1|,| |T|1|>+0#ffffff16#ff404010|,+0#0000000#ffffff0| |T|1|>+0#0000001#ffff4012| +0#0000000#ffffff0|{| |}| @11
+@75
+@4|i+0#00e0003&|n|t|e|r|f|a|c|e| +0#0000000&|Y+0#0000001#ffff4012|1|<|T+0#0000000#ffffff0|1|,| |T|2|>+0#0000001#ffff4012| +0#0000000#ffffff0|e+0#00e0003&|x|t|e|n|d|s| +0#0000000&|F+0#0000001#ffff4012|u|n|c|t|i|o|n|<|F+0#ffffff16#ff404010|u|n|c|t|i|o|n|<|F+0#0000001#ffff4012|u|n|c|t|i|o|n|<|T+0#0000000#ffffff0|1|,| |T|2|>+0#0000001#ffff4012|,+0#0000000#ffffff0| @6
+@20|F+0#0000001#ffff4012|u|n|c|t|i|o|n|<|T+0#0000000#ffffff0|1|,| |T|2|>+0#0000001#ffff4012|>+0#ffffff16#ff404010|,+0#0000000#ffffff0| @36
+@20|F+0#ffffff16#ff404010|u|n|c|t|i|o|n|<|T+0#0000000#ffffff0|1|,| |T|2|>+0#ffffff16#ff404010|>+0#0000001#ffff4012| +0#0000000#ffffff0|{| |}| @33
+@75
+@4|i+0#00e0003&|n|t|e|r|f|a|c|e| +0#0000000&|S+0#0000001#ffff4012|t|a|c|k|a|b|l|e|<|E+0#0000000#ffffff0|>+0#0000001#ffff4012| +0#0000000#ffffff0|e+0#00e0003&|x|t|e|n|d|s| +0#0000000&|I+0#0000001#ffff4012|t|e|r|a|b|l|e|<|E+0#0000000#ffffff0|>+0#0000001#ffff4012| +0#0000000#ffffff0@28
+@4|{| @69
+| +0#00e0e07&@7|b+0#00e0003&|o@1|l|e|a|n| +0#00e0e07&|i|s|E|m|p|t|y|(|)|;+0#0000000&| @48
+| +0#00e0e07&@7|E| |p|e@1|k|(|)|;+0#0000000&| @57
+@57|3|7|,|2|-|5| @7|2|5|%| 
diff --git a/runtime/syntax/testdir/dumps/java_generics_03.dump b/runtime/syntax/testdir/dumps/java_generics_03.dump
new file mode 100644
index 0000000..3e4f6c8
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_generics_03.dump
@@ -0,0 +1,20 @@
+| +0#00e0e07#ffffff0@7|E| |p|e@1|k|(|)|;+0#0000000&| @57
+| +0#00e0e07&@7|E| |p|o|p|(|)|;+0#0000000&| @58
+| +0#00e0e07&@7|S+0#0000001#ffff4012|t|a|c|k|a|b|l|e|<|E+0#0000000#ffffff0|>+0#0000001#ffff4012| +0#00e0e07#ffffff0|p|o|p|A|l@1|(|S+0#0000001#ffff4012|t|a|c|k|a|b|l|e|<|?+0#0000000#ffffff0| +0#00e0e07&|s+0#00e0003&|u|p|e|r| +0#00e0e07&|E+0#0000000&|>+0#0000001#ffff4012| +0#00e0e07#ffffff0|e|l|e|m|e|n|t|s|)|;+0#0000000&| @15
+| +0#00e0e07&@7|S+0#0000001#ffff4012|t|a|c|k|a|b|l|e|<|E+0#0000000#ffffff0|>+0#0000001#ffff4012| +0#00e0e07#ffffff0|p|o|p|S|o|m|e|(|S+0#0000001#ffff4012|t|a|c|k|a|b|l|e|<|?+0#0000000#ffffff0| +0#00e0e07&|s+0#00e0003&|u|p|e|r| +0#00e0e07&|E+0#0000000&|>+0#0000001#ffff4012| +0#00e0e07#ffffff0|e|l|e|m|e|n|t|s|,| +0#0000000&@15
+| +0#00e0e07&@19|P+0#0000001#ffff4012|r|e|d|i|c|a|t|e|<|?+0#0000000#ffffff0| +0#00e0e07&|s+0#00e0003&|u|p|e|r| +0#00e0e07&|E+0#0000000&|>+0#0000001#ffff4012| +0#00e0e07#ffffff0|f|i|l|t|e|r|)|;+0#0000000&| @25
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diff --git a/runtime/syntax/testdir/dumps/java_generics_04.dump b/runtime/syntax/testdir/dumps/java_generics_04.dump
new file mode 100644
index 0000000..2e02037
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_generics_04.dump
@@ -0,0 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/java_generics_05.dump b/runtime/syntax/testdir/dumps/java_generics_05.dump
new file mode 100644
index 0000000..7e51e7d
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_generics_05.dump
@@ -0,0 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/java_generics_06.dump b/runtime/syntax/testdir/dumps/java_generics_06.dump
new file mode 100644
index 0000000..de1c46c
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_generics_06.dump
@@ -0,0 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/java_generics_07.dump b/runtime/syntax/testdir/dumps/java_generics_07.dump
new file mode 100644
index 0000000..fffbf04
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_generics_07.dump
@@ -0,0 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/java_generics_99.dump b/runtime/syntax/testdir/dumps/java_generics_99.dump
new file mode 100644
index 0000000..a7dff09
--- /dev/null
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diff --git a/runtime/syntax/testdir/input/java_generics.java b/runtime/syntax/testdir/input/java_generics.java
new file mode 100644
index 0000000..c9b001a
--- /dev/null
+++ b/runtime/syntax/testdir/input/java_generics.java
@@ -0,0 +1,140 @@
+// VIM_TEST_SETUP let g:java_highlight_functions = 'style'
+// VIM_TEST_SETUP let g:java_highlight_generics = 1
+// VIM_TEST_SETUP hi link javaGenericsC1 Todo
+// VIM_TEST_SETUP hi link javaGenericsC2 Error
+
+import java.math.BigInteger;
+import java.util.function.Consumer;
+import java.util.function.Function;
+import java.util.function.LongFunction;
+import java.util.function.Predicate;
+
+class GenericsTests<T extends Number & Comparable<? super T>, U>
+{	// JDK 21+.
+	static final Function<Function<Object, Object>, Object> PARTIAL =
+						GenericsTests.y0();
+	static final Function<BigInteger, BigInteger> FACTORIAL_2000 =
+				GenericsTests.<BigInteger, BigInteger>y1()
+		.apply(f -> x -> (x.compareTo(BigInteger.ONE) < 1)
+			? BigInteger.ONE
+			: x.multiply(f.apply(x.subtract(BigInteger.ONE))));
+
+	static <T1> Y0<T1> y0()
+	{
+		return (Function<T1, T1> f) -> f.apply(
+					GenericsTests.<T1>y0()
+						.apply(f));
+	}
+
+	static <T1, T2> Y1<T1, T2> y1()
+	{
+		return (Function<Function<T1, T2>, Function<T1, T2>> f) ->
+			(T1 x) -> f.apply(GenericsTests.<T1, T2>y1()
+						.apply(f))
+				.apply(x);
+	}
+
+	static<T> void noOp(T dummy) { }
+
+	interface alpha<T> { }
+
+	interface Y0<T1> extends Function<Function<T1, T1>, T1> { }
+
+	interface Y1<T1, T2> extends Function<Function<Function<T1, T2>,
+					Function<T1, T2>>,
+					Function<T1, T2>> { }
+
+	interface Stackable<E> extends Iterable<E>
+	{
+		boolean isEmpty();
+		E peek();
+		E pop();
+		Stackable<E> popAll(Stackable<? super E> elements);
+		Stackable<E> popSome(Stackable<? super E> elements,
+					Predicate<? super E> filter);
+		Stackable<E> push(E element);
+		Stackable<E> pushAll(Iterable<? extends E> elements);
+		Stackable<E> pushSome(Iterable<? extends E> elements,
+					Predicate<? super E> filter);
+		Stackable<E> wind(Consumer<? super Stackable<E>> action);
+	}
+
+	sealed interface Num<N extends Number>
+	{
+		int radix();
+		N value();
+	}
+
+	record Bin<N extends Number>(N value) implements Num<N>
+	{
+		public int radix() { return 2; }
+	}
+
+	record Dec<N extends Number>(N value) implements Num<N>
+	{
+		public int radix() { return 10; }
+	}
+
+	record Hex<N extends Number>(N value) implements Num<N>
+	{
+		public int radix() { return 16; }
+	}
+
+	record Oct<N extends Number>(N value) implements Num<N>
+	{
+		public int radix() { return 8; }
+	}
+
+	static Num<Long> fromDecimal(long x, int radix)
+	{
+		record Pair(LongFunction<Num<Long>> a,
+					LongFunction<String> b) { }
+		final Pair p = switch (radix) {
+			case 2 -> new Pair(Bin::new, Long::toBinaryString);
+			case 8 -> new Pair(Oct::new, Long::toOctalString);
+			case 16 -> new Pair(Hex::new, Long::toHexString);
+			default -> new Pair(Dec::new,
+						y -> Long.toString(y));
+		};
+		return p.a().apply(Long.parseLong(p.b().apply(x), radix));
+	}
+
+	static long toDecimal(Num<Long> x)
+	{
+		return Long.parseLong(switch (x) {
+			case Bin<?>(Long b) -> Long.toBinaryString(b);
+			case Oct<?>(Long o) -> Long.toOctalString(o);
+			case Hex<?>(Long h) -> Long.toHexString(h);
+			default -> Long.toString(x.value());
+		}, x.radix());
+	}
+
+	@java.lang.annotation.Target(
+				java.lang.annotation.ElementType.TYPE_USE)
+	@interface Taggable
+	{
+		String value() default "";
+	}
+
+	{
+		int N = 0, X = 1, Y = 2;
+		Predicate<T> f = y->N<y.intValue();
+		Predicate<T> g = y->X<N&&(Integer)y>N;
+		boolean[] bb = {
+			X<N||N>Y, X < Y, X <Y, X <(Y), X<(Y), (X)<Y,
+			Double.isFinite(X<<Y),
+			X<=Y, X<(int)(byte)Y, X<~Y, X<-Y, X<+Y,
+		};
+		Class<?> klass = GenericsTests.class;
+		Class< java.lang.Class<@Taggable("<>")int[][]> [] [] >
+		[ ] [ ] $ [ ] [ ];
+		if (false) { new GenericsTests<>(); }
+		alpha<?> ao;
+		alpha<U> au;
+		alpha<alpha<U>> aau;
+		alpha<Y0<?>> ay0o;
+		alpha<Y0<U>> ay0u;
+		Y0<alpha<?>> y0ao;
+		Y0<alpha<U>> y0au;
+	}
+}